These are OEM calipers fit the later Power Brake Booster cars, re-built with new pistons and rubber parts, new bleeders. These calipers are NOT offshore units. If you are looking for OEM quality parts, these are the ones to buy. To identify look for 16P or 16PB embossed on casting, also let us know if inlet line is Metric or American thread, (an easy way to check, try and screw in (3/8"-24) USA fine threaded bolt, if it doesn't fit you have Metric threads.)